Abstract
Achieving high efficiency and long-term device stability is a vital issue for the commercialization of organic-inorganic hybrid perovskite solar cells (PeSCs). In this work, phenylethylammonium iodide (PEAI)-induced bilateral interface engineering was developed to improve the device efficiency and stability of methylammonium lead triiodide (MAPbI3)-based PeSCs. Introducing PEAI onto a poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) layer modifies the surface properties of PEDOT:PSS and facilitates the formation of a high-quality perovskite active layer with enlarged grains on PEDOT:PSS. PEA+ in PEAI-PEDOT:PSS also alters the work function of PEDOT:PSS, leading to a reduction in the energy difference between the PEDOT:PSS and MAPbI3 perovskite layers, which decreases the energy loss during charge transfer. Additionally, depositing PEAI onto three-dimensional (3D) perovskite yields a two-dimensional/three-dimensional (2D/3D) stacked structure for the perovskite active layer. Because the two-dimensional (2D) top layer acts as a capping layer to prevent water penetration, the stability of the perovskite active layer is significantly enhanced. A PeSC device fabricated based on this combination exhibits enhanced power conversion efficiency (PCE) and an extended device lifetime compared to a pristine PeSC. Under high-humidity conditions (75 ± 5%), the PEAI-treated PeSC retains 88% of its initial power conversion efficiency (PCE) after 100 h. In contrast, a pristine PeSC device loses over 99% of its initial PCE after only 25 h under the same conditions.
Original language | English (US) |
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Pages (from-to) | 24827-24836 |
Number of pages | 10 |
Journal | ACS Applied Materials and Interfaces |
Volume | 12 |
Issue number | 22 |
DOIs | |
State | Published - Jun 3 2020 |
Bibliographical note
Funding Information:This research was supported by the Global Frontier Program through the Global Frontier Hybrid Interface Materials (GFHIM) of the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2013M3A6 B1078874). This research work was also supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry & Energy (MOTIE) of Republic of Korea (20193091010110).
Publisher Copyright:
© 2020 American Chemical Society.
Keywords
- bilateral interface engineering
- high efficiency
- long-term stability
- PEAI
- perovskite solar cells
ASJC Scopus subject areas
- General Materials Science